Drilling apparatus



Aug. 8; 1933.

J. M. cALDERwooD 1,921,503

DRILLI NG APPARATUS Filed sept. l22 192s 2 sheets-sheet 1 cfu/aad Patented Aug. 8, 1933 stares TENT oei-CE vApplication September 22, 1928 Serial No. 307,582

2 Claims.

My invention relates to drill holders or rock drilling apparatus and has for its object tov provide a new and efcient means for sliding, tilting,`

retracting, and projecting the drill steel in the operation of the device, and to automatically move or throw back the drillings or cuttings from the point of the bit and at the same time to permit the drill steel to turn freely while the bit is drawn back.

A further object is to provide means by which the Outrigger arm may be lengthened or shortened in order to expedite the adjustment from one position to another, enabling the operator to greatly facilitate the work and materially increase the footage covered per day.

This invention is'an improvement on the drill Vholders set forth in the Letters Patent issued to me on July 23, 1918, Number 1,273,733, and March 11, 1919Number 1,298,918, with additional modincations not embodied in eitherof said Letters Patent.

In the drawings, in which I have shown the preferred manner of building my invention Figure 1 is a side elevation of the device, Figure 2 is a plan view oi the mounting portion of my device showing the pivoting thereof.v Figure 3 is a side view of the pivot bearing in which the tilting head is carried and supported. Figure 4 is a modification of my invention showing the use of a ratchet to turn the rdrill instead of Vby gearing. Figure 5 is a side elevation of thevdrill supporting and turning apparatus. Figure 6 is an end view of the levers for projecting and re-V tracting the drill. Figure 7 is an end view of one of the clamps used tohold the drill from turning. f l

In the drawings, the column upon which my device is carried is shown at A, with a collar B secured on the said column by suitable set screws. Above the collar B and` encircling the column A, I provide a sleeve 3, which sleeve is provided with a bearing clamp 4 on one side thereof in which a stub shaft 4a is carried. The stub shaft 4a is formed on a socket 5, which vsocket is adapted to hold a support bar 9, and the rshaft 4a acts as the pivot for the bar 9. Another socket 6 is carried on the bar 9 and has a bearing clamp 7 formed on Vthe top side thereof, in which the stub shaft 8 of a tiltable head 10 is carried. This 50 is the pivot foi` the tiltable head 10 to adaptthe machine to bore at any desired angle. The sleeve 3 is the horizontal pivot for the entire operating portion of the device. Longitudinally and adjustably carried on the said support bar 9, is.

and supportrnember of the machine.l A bolt 13 is provided to tighten the bearing clamp 7 on the stub shaft 8. This construction provides a pivot point for the drill carrying framework C, on which the drill is carried and to which the ham 69 mer is secured, and also provides an easy method of changing the angle of the drill. Depending from the tiltable head 10 I provide a drill carrying framework C which framework ismade up vof an upright member C1 secured to the head 10 and an angle brace C2 which is secured at its lower end to the member C1 and at its upper end to the head 10. Cross members 19 and 20 are provided on the framework and the extreme ends thereof are pivot points for the retracting y and projecting levers 21 and 22. The lever 21 has slots 21a and 2lb in the ends thereof in which slots the pivot pins operate when the lever is moved by the movement of the hammer handle; The said levers 21 and 22 are pivoted to the mem- 75 bers 19 and 20 by suitable pins and are each secured together by the pivot pin 22a. The lever 22 is made up of two bars 11 and 12 which are spaced apart by the screw tightener 13a and the lower ends 14 of the bars are bent inwardly to 8.o partially encircle a flanged drill holding socket 15. A spring V16 holds the bars apart when the screw tightener 13a is released. A rack 17 is idably carried in the framework C through a bracket D on the angle braces Cl and C2, and the S5 inner end of the 'said rack is secured to an adjustable member 17a which in turn is secured to a handle clamp 18, which handle clamp is secured on the handle F of my hammer. The said lever 21 is secured to the saidrack at the point at 90 which the rack and the member 17o/are pivoted together. f

On the lower end of the framework C, is a bi-.u furcated bearing 40 which carries' a rotatable member 41, therein. The said rotatable member 41 is provided with a medially situated ring gear 42, and the said member 41'is provided with a hexagonal central hole 43 therethrough, through which the drill bit G is placed, carried and operated. A drive shaft 44 is mountedin a suitable 100 bearing 44a von the bearing 40 and a pinion 45 is mounted on the lower end with the teeth of the pinion 45 meshing with the teeth of the gear 42. The upper end of the said shaft 44 is mounted in a bearing inthe head 10 and a pinion gear is carried on the said shaft with the teeth theren of meshing with the teeth on the rack 17, so that when the rack 17 is moved longitudinally by the movement of the hammer handlethe pinion will rotate the shaft 44 and the gear 42 and will roi110 tate the member 41 thereby rotating the drill bit. The pinion 47 is provided with a ratchet 48 on the lower side thereof so that only the backwardly movement of the rack 17 will rotate the pinion and a spring 48a holds the pinion 47 in engagement with said ratchet 48. The lower end of the lever 22 is engaged with the drill holding socket l5, through which the drill bit G is placed and a bolt 24 in the clamp 23, which is a portion of the socket 15, secures the bit securely therein so that when the lever is moved by the action of the hammer handle the bit will be moved foi'` wardly on the forward stroke of the hammer and backwardly as the motion of the handle moves in the opposite directions. Tile socket l is made so that the bit G may not rotate therein, but the socket will rotate in between the ends 14 of the bars 11 and 12 without undue friction, but so that it will move the bit forward and back with every movement of the hammer handle.

A YThe hammer handle F is pivoted at its upper end bythe pi`n49 in the block 26, and the front end of the block 26 is provided with a bar 25a which bar is carried in a socket in the head l() and a set s'crew-S Iis secured in the head 1D to secure the said bar 26a in any desired position.I l'With this construction the pivcted end of the hammerI handle .1F may be moved forwardly or backwardly from the work as the bit ism'ove'd to or away from the work, the set screw '8 may be loosened andl the hammer handle set nearer to the work. `This alsoprovides. for diiferent length bits 'to be used in my device without unnecessary changes in the vinaclrline. A hammer headvl is secured on the lower free end of 'the handle F and is adapted `to be moved backwardly and forwaidiy 'to hit the end of 'the drm eil: G. A control `lever 2'5 is secured to the block 26 and an adjustable spring clamp 29 is carried thereon with means 'for securing the hook to the handle at any desired position by set screws 30. A spring clamp 32 provided with hooks on each side thereof is then secured to the hammer handle F in which the ends of springs 31 and 31a are carried. The other end of the 'spring '3l is secured to the spring clamp 29 and the other end of theA spring Blais secured to another spring clamp The said spring cla-nip B5 is secured to la 376 mounted on the upright nieinber C1 of the framework C, ilhese springs so secured assist the hammer in its work and assist the operator to withdraw and force the hammer 'to and from the end loi the drill, bit with more force and greater speed than he normally could exert. VThe operation of my device is as follows:- The column is set'in the desired place and the dr-ill directed into the spot in which the hole is required. Thewbearing clamp '7 isthen Vtightened securing the device in vthe angled position, and the sleeve -3 is tightened around the column securing :the direction of the bit. The operator may then commenceto drill. With either hand cured on said drill; Aa lever pi he may grasp the handle of the hammer F and move the head F1 to and from the bit with any desired force. The springs 31 and 31a will aid him in his operation and in cases where the drill is inclined upwardly both springs can be attaohed to the same side of the hammer to help in the drilling, or vice Versa where the bit is inclined downwardly. When the drill hammer is withdrawn the levers 21 and 22 will be operated and the drill bit withdrawn from 'the hole a short distance and as the haininer moves in the opposite direction the bit will be moved into the hole until when the hammer hits the end of the bit it will be against the inner face of hole. With each backward motion of the hammer handle the rack i7 will rotate the shaft by the pinion 4'?, and the gear 42 will be rotated by the pinion 45 which iwill rotate the member 41 rotating the drill with each hammer blow. As the handle is advanced the. ratchet under the pinion 47 will allow the pinion to rotate without rotatingthe shai` l H ving vtlill described invention i desire to secure by Letters Patent and claim:

in a deviceof the class described the combi nation of a drill supporting framework having a drill carrying bearing suspended therefrom; a drill passedv therethrough; clamps e drill from turning ina rotatable member, said member being carried in said lrarneworhV ing; a ring gear-formed around said member; a hammer suspended from said framework; means connected with said hammer to rotate said rotatable member with each stroke oi 'the hami -erg a drillholdingsocket carried on the drill baokwardly of the rotatable member; a lever, pivotally supported Yfrom `said framework, having one end clamped to said socket; another lever secured to the free end of the rst mentioned lever andalso supported from said framework, secord lever actuated by the movenien'tof the han' handle; springs attached to the handle and framework to aid in actuating said hammer; and a column to lwhich the entire framework is pivotally secured.

v2. In a device of the `class' described the cornbination of a `drill support column; framework secured adjustably thereto; a hammer nivotally suspended from s aid fram Y pended from said framework carriedr in said bearing; a ai rotatable member; to rotate the rotatable member and said drill; a d "ill holding clamp seframeer lever .piv-

workandsecuredto said clamp; anot"v otally yjointed to the top end of st lever and also pivoted to said framework; -a i pivotally connecting said last lever wi-ththeharn Jr handle to move said clamp drill forwardly and backwardly by each forward Iand backward movement of the hammer handle. Y

JOHN CALDERWOOD. 

